Summary of the international discussion meeting on radiation effects on superconductivity

Conference · Sat Jan 01 04:00:00 EST 1977

OSTI ID:5296771

Brown, B S

The purpose of organizing a discussion meeting on radiation effects on superconductivity was to bring researchers in the field together for the first time in order to actively discuss the present status and future direction of the field. One discussion centered around the research tools being applied to this area for the first time. Whereas in the past the measurements have primarily been J/sub c/, T/sub c/, rho, magnetic susceptibility, ac losses, and x-ray diffraction, talks were given on the recent application to this area of channeling techniques, Moessbauer spectroscopy, specific heat, and more detailed x-ray measurements. It was also very evident that the most meaningful experiments were those that measured two or more properties on the same sample as a function of irradiation dose and post-irradiation annealing. It was pointed out that annealing experiments should be helpful in trying to understand the defects responsible for the changes in the various superconducting properties. The areas requiring the most extensive future research are: (1) The nature of the defect responsible for the dramatic T/sub c/ decreases in A-15 compounds (specifically disorder versus large static displacements) and the role of these defects vis-a-vis other defects present in determining flux pinning changes.(2) The summation problem, i.e., the proper way to sum individual defect fluxoid interactions (primarily in elemental superconductors) in order to compare to the experimentally determined volume pinning force density. (3) More accurate data on the effect of liquid helium temperature neutron irradiation (fission and 14 MeV) on J/sub c/ of commercially important composite superconductors (primarily NbTi, but also Nb/sub 3/Sn and V/sub 3/Ga). (4) The application of ion implantation in producing superconductors with enhanced properties.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5296771
• Report Number(s): CONF-770801-24
• Country of Publication: United States
• Language: English

Related Subjects

656100* -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BETA-W LATTICES
CHANNELING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
ION IMPLANTATION
MAGNETIC FLUX
MEETINGS
MOESSBAUER EFFECT
PHYSICAL PROPERTIES
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
SPECIFIC HEAT
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE